GET

/v1/schemas/fal/video/alibaba/happy-horse/v1.1/text-to-video

Accept:

kind inputactivity videohash 4a7c76af…extracted Aug 10, 2026version currentsource upstream spec ↗

field	recorded source
schema	Source linked above. Source trace `7cf2de4eaa9bfee03f807daea5589f6fd63328942afd6d19f7ee8047c3050801` { "fetchedAt": 1786338105, "extractorVersion": "1", "verifiedAt": null }

Request body

6 properties · 1 required · 0 $defs

property	type	description	constraints
prompt*	string	Text prompt describing the desired video. Max 2500 characters.	length ≥ 1
seed	integer	Random seed for reproducibility (0-2147483647).	nullable
enable_safety_checker	boolean	Enable content moderation for input and output. Disabling it requires account authorization; unauthorized requests are always checked.	default: true
aspect_ratio	enum	Aspect ratio of the generated video.	16:9 \| 9:16 \| 1:1 \| 4:3 \| 3:4 \| 21:9 · +3 more · default: "16:9"
duration	enum	Output video duration in seconds (3-15).	3 \| 4 \| 5 \| 6 \| 7 \| 8 · +7 more · default: 5
resolution	enum	Output video resolution tier.	720p \| 1080p · default: "1080p"

Validate a payload

before you spend tokens

shell

$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"fal","endpointId":"alibaba/happy-horse/v1.1/text-to-video","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}